HDR to SDR Tone Mapping - Intel Quick Sync for new processors like Comet Lake

[KCX]

Hello dear Plex Community!

Since there is still no thread of my own on this topic and I don’t want to continue hijacking other threads, here is my own discussion that can then hopefully be identified as a success one day.

My server: Ubuntu 21.04 with current updates and software
Hardware: Intel i3 10100 with UHD 630 an Z490, 16GB RAM and P5 NVMe (RAM transcoding)

When I tried to transcode a 4K HDR source into an SDR, I noticed that this was done entirely in software and that the CPU was overloaded accordingly and the GPU was useless.

Then I was informed that due to the outdated Beignet and OpenCL packages, newer processors are not supported. Enable Comet Lake support by rcombs · Pull Request #20 · intel/beignet · GitHub

@ChuckPa

Beignet and OpenCL as distributed by Ubuntu don’t include CoffeeLake support.
CoffeeLake does not include backward support in the GPU like we had with the iHD and i965 drivers. The transcoder is trying to activate it and fails. It falls back to software HDR->SDR.

The solution to modify the packages myself is not feasible for me. If I understand correctly, the Plex team is working on a solution and wants to replace the outdated one.

@ChuckPa

Engineering has been working on the replacement for Beignet & OpenCL since it was discovered during their initial forum preview. The better, which they are developing for all platforms now, is the Intel Compute Runtime (ICR).

The following processors do NOT yet support the tone mapping feature in hardware:

• some Coffe Lake processors
• all Amber Lake
• all Comet Lake processors
• all upcoming processors such as Rocket Lake or Alder Lake

So dear Plex team, I hope that the Intel Compute Runtime is the right solution for us and that you can integrate it successfully. I would be happy if this thread can be marked as solved in the near future. Many thanks and regards ! KCX

[OttoKerner]

@KCX

The solution to rewrite the packages myself is not feasible for me.

That’s not what @ChuckPa has told you:

The temporary solution is to download the source for Beignet & OpenCL, let it configure itself for your CPU, then build and install.

Compiling software is not the same as rewriting software.

[KCX]

@OttoKerner I’m sorry that I didn’t express myself 100% correctly, I didn’t mean to offend anyone… I corrected it. btw. English is not my mother tongue, so I ask for your pardon if I put it in the wrong way.

[OttoKerner]

If you’re continuing to use Linux, you will encounter the need to recompile – inevitably.
You might as well learn how to do it now.

[KCX]

Nice comment! really great support

I have the information from another forum that I need to install Plex in Docker. Now it works @ChuckPa so there is a solution after all. USE DOCKER

add latest intel compute packages for opencl

[KCX]

btw. the Nvidia image is the best of all when it comes to tone mapping

greetings !